CK5
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Would it be worth it to run race fuel.....?

<<BTW, all 'gasoline' has roughly the same BTU content so there is no power difference in the fuel alone.>>

Actually, there is a difference in BTU content. Depending on where the fuel is sold, there are additives used in the refining process that will lower the BTU level of the fuel. Ethanol blend fuels from sunoco come to mind. The feds also monkey with vapor pressures in different areas of the country for emissions purposes, and that also impacts the power you get out of the fuel.

In reality, BTU is more important than an octane number. Octane numbers can be inflated by using a higher research octane number in the r+m/2, making the consumer think they're buying more powerful fuel than they're actually getting. The BTU of the fuel is what determines the suitability of that fuel for a given application.

What you want is a fuel that delivers the most power to the wheels,without detonation,and not all fuels are equal. Sunoco 94 is crap here in Ohio because of the ethanol in it (lower BTU's), and I get better results from 87 shell & marathon fuel. Thing is, every car is different, and you've got to try different fuels until you find what the vehicle likes.

<warning: blatant commercial >
I also use a product called TK - 7, which raises the BTU of a given base fuel. That enables me to burn 14% more of my fuel on combustion stroke, , cutting my emissions in half and getting my k5 another 3 miles per gallon. It also keeps the 10 - 1 327 in my 69 Camaro happy. If you need race gas, these guys have developed a way to make up to 120 0ctane race gas, adding their product to 93 unleaded pump gas. Check out the website at www.bndautomotive.com for the whole story.

Tom /forums/images/graemlins/usaflag.gif /forums/images/graemlins/k5.gif
 
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I just thought more octane = more power..

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Lots of people think that... I see 'em at the gas station paying an extra 25 cents per gallon to pump premium fuel into their low compression, bone stock econoboxes. The oil companies LOVE it! The cost difference for them is just a couple of pennies per gallon so the profit is MUCH higher than when people buy regular. Lots of those folks will even swear that it "really helps" when asked why they're filling up with premium. /forums/images/graemlins/yikes.gif

There are also a LOT of people in Colorado that fill up with 87 octane (which is the mid-grade fuel at this altitude) when their engine would run perfectly on 85. But since the owners manual recommends 87 (which IS required at sea level) then that's what they fill up the tank with. /forums/images/graemlins/eek.gif

[/ QUOTE ] I run the 91 octane, and I have noticed better gas mileage. Haven't seen any more power, but defently better mileage.
 
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